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8.6 - Chemical Reactions Part 1 Vocabulary- Regular Word Definition Periodic Table Arrangement of the elements that are in order by their atomic number and chemical properties Metals Nonmetals Metalloids Atomic Number Majority of elements on the periodic table are classified as metals. Characteristics: Shiny and solid Conduct heat and electricity Elements on the far right side of the periodic table Characteristics: Liquid and gasses Dull and brittle Elements on either side of the stair step or black line on the periodic table Characteristics: Semi-metals - can take on properties of metals or nonmetals Dull or shiny The number of protons or electrons normally found in an atom of a given chemical element. Picture Atomic Mass Atomic mass indicates the size of an atom. The sum of the mass of all the protons and neutrons in the atom. Protons Positive charge subatomic particle in the nucleus of the atom Neutrons Neutral charge subatomic particle in the nucleus of the atom Electrons Negative charged subatomic particle outside of the nucleus of the atom Valence Electron Electron(s) in the outermost energy level of the atom A diagram that represents atoms or Lewis Dot Diagram molecules by showing electrons as dots that are surrounding the element symbol. Ionic Bonds A chemical bond that involves the transfer of valence electrons between atoms Covalent Bonds A chemical bond that involves the sharing of electron pairs between atoms Molecule Compound A group of atoms bonded together representing a chemical reaction 2 or more elements chemically bonded together to create a new pure substance Simple Molecule When two or more atoms are joined together chemically Complex Molecule Large amount of atoms joined together chemically